404344013120221 has 4 divisors (see below), whose sum is σ = 405120105276444. Its totient is φ = 403567920964000.

The previous prime is 404344013120207. The next prime is 404344013120231. The reversal of 404344013120221 is 122021310443404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58088954235321 + 346255058884900 = 7621611^2 + 18607930^2 .

It is a cyclic number.

It is not a de Polignac number, because 404344013120221 - 2¹¹ = 404344013118173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404344013120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388046077330 + ... + 388046078371.

It is an arithmetic number, because the mean of its divisors is an integer number (101280026319111).

Almost surely, 2^{404344013120221} is an apocalyptic number.

It is an amenable number.

404344013120221 is a deficient number, since it is larger than the sum of its proper divisors (776092156223).

404344013120221 is an equidigital number, since it uses as much as digits as its factorization.

404344013120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776092156222.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 404344013120221 its reverse (122021310443404), we get a palindrome (526365323563625).

The spelling of 404344013120221 in words is "four hundred four trillion, three hundred forty-four billion, thirteen million, one hundred twenty thousand, two hundred twenty-one".